<template>
  <div id="detail">
    <detail-nav-bar class="detail-nav" @titleClick="titleClick" ref="nav"/>
    <scroll class="content" 
            :probe-type="3" 
            ref="scroll" 
            @scroll="contentScroll">
      <!-- 属性： topImages  传入值：top-images -->
      <detail-swiper :top-images="topImages"/>
      <detail-base-info :goods="goods"/>
      <detail-shop-info :shop="shop"/>
      <detail-goods-info :detail-info="detailInfo" @imageLoad="imageLoad"/>
      <detail-param-info ref="params" :param-info="paramInfo"/>
      <detail-comment-info ref="comment" :comment-info="commentInfo"/>
      <goods-list ref="recommend" :goods="recommends"/>
     
    </scroll>

    <detail-button-bar @addCart="addToCart"></detail-button-bar>
    <back-top @click.native="backClick" v-show="isShowBackTop" />
     <!-- <toast message="哈哈哈" :show=""/> -->
  </div>
</template>

<script>
  import DetailNavBar from './childComps/DetailNavBar'
  import DetailSwiper from './childComps/DetailSwiper'
  import DetailBaseInfo from './childComps/DetailBaseInfo'
  import DetailShopInfo from './childComps/DetailShopInfo'
  import DetailGoodsInfo from './childComps/DetailGoodsInfo'
  import DetailParamInfo from './childComps/DetailParamInfo'
  import DetailCommentInfo from './childComps/DetailCommentInfo'
  import DetailButtonBar from './childComps/DetailButtonBar'

  import Scroll from 'components/common/scroll/Scroll'
  import GoodsList from 'components/content/goods/GoodsList'
  import {BACK_POSITION} from 'common/const' 
  // import Toast from 'components/common/toast/Toast'

  import {getDetail, Goods, Shop, GoodsParam, getRecommend} from "network/detail";
  import {debounce} from 'common/utils'
  import {itemListenerMixin, backClickMixin} from 'common/mixin'

  import { mapActions } from 'vuex'

  export default {
    name: "Detail",
    components: {
      DetailNavBar,
      DetailSwiper,
      DetailBaseInfo,
      DetailShopInfo,
      DetailGoodsInfo,
      DetailParamInfo,
      DetailCommentInfo,
      DetailButtonBar,
      Scroll,
      GoodsList,
      // Toast
    },
    mixins: [itemListenerMixin, backClickMixin],
    data() {
      return {
        iid: null,
        topImages: [],
        goods: {},
        shop: {},
        detailInfo: {},
        paramInfo: {},
        commentInfo: {},
        recommends: [],
        themeTopYs: [],
        getThemeTopY: null,
        currentIndex: 0
      }
    },
    created() {
      // 1.保存传入的iid
      this.iid = this.$route.params.iid

      // 2.根据iid请求详情数据
      getDetail(this.iid).then(res => {
        // 1.获取顶部的图片轮播数据
        // console.log(res);
        const data = res.result;
        this.topImages = data.itemInfo.topImages

        // 2.获取商品信息
        this.goods = new Goods(data.itemInfo, data.columns, data.shopInfo.services)

        // 3.创建店铺信息的对象
        this.shop = new Shop(data.shopInfo)

        // 4.保存商品的详情数据
        this.detailInfo = data.detailInfo;

        // 5.获取参数的信息
        this.paramInfo = new GoodsParam(data.itemParams.info, data.itemParams.rule)

       // 6.取出评论的信息
        if (data.rate.cRate !== 0) {
          this.commentInfo = data.rate.list[0]
        }
      })
         // 3.请求推荐数据
      getRecommend().then(res => {
        this.recommends = res.data.list
      })
     
       // 4.给getThemeTopY赋值(对给this.themeTopYs赋值的操作进行防抖)
      this.getThemeTopY = debounce(() => {
        this.themeTopYs = []
        this.themeTopYs.push(0)
        this.themeTopYs.push(this.$refs.params.$el.offsetTop)
        this.themeTopYs.push(this.$refs.comment.$el.offsetTop)
        this.themeTopYs.push(this.$refs.recommend.$el.offsetTop)
        this.themeTopYs.push(Number.MAX_VALUE)

        console.log(this.themeTopYs);
          
     }, 100)

    },
    mounted()  {
     
    },
    destroyed() {
      this.$bus.$off('imageLoad', this.itemImgListener)
    },
    methods: {
      ...mapActions(['addCart']),
      imageLoad() {
        this.$refs.scroll.refresh()

        this.getThemeTopY()
      },
      titleClick(index) {
         this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 200 )
        // console.log(index);
      },
      contentScroll(position) {
         // 1.获取y值
         const positionY = -position.y
        //  console.log(Number.MAX_VALUE);
         

         // 2.positionY和主题中的值进行对比
         let length = this.themeTopYs.length
        //  for(let i = 0; i < length; i++) {
        //    if(this.currentIndex !== i && ((i < length - 1 && positionY >= this.themeTopYs[i] && positionY < this.themeTopYs[i+1]) || (i === length - 1 && positionY >= this.themeTopYs[i]))) {
        //      this.currentIndex = i
        //      console.log(this.currentIndex)
        //      this.$refs.nav.currentIndex = this.currentIndex
        //    }
        //  }

        for(let i = 0; i < length - 1; i++) {
           if (this.currentIndex !== i && (positionY >= this.themeTopYs[i] && positionY < this.themeTopYs[i+1])) {
            this.currentIndex = i;
            this.$refs.nav.currentIndex = this.currentIndex
          }
        }

        
        //3. 是否显示回到顶部
       this.isShowBackTop = -position.y > BACK_POSITION
      },
      addToCart() {
        //1.获取购物车需要展示的信息
        const product = {}
        product.image = this.topImages[0]
        product.title = this.goods.title
        product.desc = this.goods.desc
        product.price = this.goods.realPrice
        product.iid = this.iid

        // 2.将商品添加到购物车里
        // this.$store.cartList.push(product)
        // this.$store.commit('addCart', product)
       this.addCart(product).then(res => {
        //  console.log(res)

        // this.$toast.show(res, 2000)
        // console.log(this.$toast);
        this.$toast.show(res, 1500)
       })

        // this.$store.dispatch('addCart', product).then(res => {
        //   console.log(res)
        // })
      }
    }
  }
</script>

<style scoped>
  #detail {
    position: relative;
    z-index: 9;
    background-color: #fff;
    height: 100vh;
  }

  .detail-nav {
    position: relative;
    z-index: 9;
    background-color: #fff;
  }

  .content {
    background-color: #fff;
    height: calc(100% - 44px - 49px);
    overflow: hidden;
  }
</style>
